In Beta 1, AstroDX can't list songs amd throws an error instead

**Describe the bug**
AstroDX will throws an error about object null reference.
```
NullReferenceException: Object reference not set to an instance of an object.

AstroDX.Contexts.Hub.Home.Navigation.EntryButton.OnPointerClick (UnityEngine.EventSystems.PointerEventData eventData) (at <00000000000000000000000000000000>:0)
UnityEngine.EventSystems.ExecuteEvents.Execute[T] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.ExecuteEvents+EventFunction`1[T1] functor) (at <00000000000000000000000000000000>:0)
UnityEngine.InputSystem.UI.InputSystemUIInputModule.ProcessPointerButton (UnityEngine.InputSystem.UI.PointerModel+ButtonState& button, UnityEngine.EventSystems.PointerEventData eventData) (at <00000000000000000000000000000000>:0)
UnityEngine.InputSystem.UI.InputSystemUIInputModule.ProcessPointer (UnityEngine.InputSystem.UI.PointerModel& state) (at <00000000000000000000000000000000>:0)
UnityEngine.InputSystem.UI.InputSystemUIInputModule.Process () (at <00000000000000000000000000000000>:0)
UnityEngine.EventSystems.EventSystem.Update () (at <00000000000000000000000000000000>:0)
UnityEngine.EventSystems.EventSystem:Update()
```

**To Reproduce**
Steps to reproduce the behavior:
1. Open AstroDX
2. Tap "Library"

**Expected behavior**
It should able to list songs in `levels/` directory.

**Device specs**
- Device: Samsung Galaxy A10
- OS: OneUI
- Version: 3.1

**Additional context**
The error does not appear in other devices such as Samsung Galaxy A52 OneUI 4.